1. 배열에서 특정 원소 개수 구하기
let fruit_list = ['사과','감','감','배','포도','포도','딸기',
'포도','감','수박','딸기']
let count = 0;
for (let i = 0; i < fruit_list.length; i++) {
let fruit = fruit_list[i];
if (fruit == '딸기') {
count += 1;
}
}
console.log(count);
let fruit_list = ['사과','감','감','배','포도','포도','딸기','포도','감','수박','딸기']
fruit_list.map((count,i) => {
let fruit = fruit_list[i]
if (fruit == '딸기') {
count +=1
}
})
console.log(count)
let fruit_list = ['사과','감','감','배','포도','포도','딸기','포도','감','수박','딸기']
let count = 0;
fruit_list.map((f)=>{
if(f == "딸기") count += 1
})
console.log(count)
2. filter 함수로 '포도'만 들어있는 podo_list 구현
let fruit_list = ['사과','감','감','배','포도','포도','딸기','포도','감','수박','딸기']
const result = fruit_list.filter(fruit => fruit =='포도');
console.log(result);
let fruit_list = ['사과','감','감','배','포도','포도','딸기',
'포도','감','수박','딸기']
let podo_list = fruit_list.filter((f)=>{
return f == '포도'
})
console.log(podo_list)